Door lock



E. LIPINER DOOR LOCK oct. 3, 1939.

Filed Aug. 3, 1938 2 Sheets-Sheet 1 INVENTOR E. LIPINER Oct. 3, 1939.

noo Loox Filed Aug. 3, 1938 2 Sheets-Sheet 2 um .wh

Patented Oct. 3, 1939 UNITED STATES PATENT OFFICE "ICh-ixus.

Hy Present invention relates to the lock art and is particularly concerned with a door lock having new and useful features of construction.

In their common form, door locks are made so that a door can only be locked in closed position or the lock unlocked to fully release the door. f

Such locks have the inherent disadvantage that the door can not be partially opened without fully releasing the lock, and under such conditions it is easily possible for an intruder to force entrance.

Chains have been used under such conditions which have the advantage of enabling the door to be partially opened while still offering some protection against intruders. but such chains are too easily removed or destroyed from the outside. To open the door fully, the door must ilrst be closed to release the'chain and this arrangement is. therefore, disadvantageous and objectionable.

Some proposals have been made to produce a door lock which is provided with one or more so-called barring devices as a part of the lock to enable the door to be' partially opened without fully unlocking the door. Such structures as have been proposed in prior patents are themselves subject to disadvantages in that they are easily broken. easily become maladjusted. and depend upon the use of springs which have a short eil'ective life. There are other recognized disadvantages such as relative high cost and dimcuity of repairing or replacing parts.

It is, accordingly, one of the objects of my present invention to provide a door-lock which is not only novel and useful in its features of construction but which makes possible functions and advantages not shared by prior locks.

Another object of the invention resides in a door lock so constructed that a door can be fully locked. partially released and fully released, and which is provided with means for preventing either a partial or a full release o! the lock, such means being rendered operative or inoperative at will from the room side of the door.

An additional object of the invention resides in a door lock composed of two units, one of which ris adapted to be attached to a door and the other of which is adapted to be attached to a door lamb or frame, the construction being such that the units cooperate to provide the functions and advantages already set forth.

A further object of the invention comprises a door lock of substantial but relatively simple construction which can be produced at moderate cost, will give long trouble-free service and which gives a maidmum'of protection.

A still further object `of the invention resides in a door lock which has a plurality of locking means or elements of such nature and construction that one or all of said locking means can be rendered operative or inoperative at will.

Other and further objects and advantages reside in the combinations, sub-combinations, and details of construction hereinafter set forth and in such other and further matters' as will be understood by those skilled in this art.

In the accompanying drawings wherein I have illustrated a preferred embodiment of the invention:

Figure l is an elevational view of the two units comprising the lock in the position they assume when the door is closed;

Fig. 2 is an elevational end view oi' the lock looking from right to left in Fig. 1;

Fig. 3 is an elevational view. partly in vertical section, of the present door lock when the same is in partially released condition;

Fig. 4 is an elevationall view of that unit of the lock which is attached to the door jamb looking from right to left in Fig. 3 but with the Darts in the positions they assume when the lock is fully released:

Fig. 5 is an elevational view of the inside of the housing forming a part of that unit which is adapted to be attached to a door;

Fig. 6 is an elevational view of the rear of that portion of the lock which is received within the housing of Fig. 5;

Fig. 7 is a sectional view taken on line VII-VII of Fig. 8;

Fig. 8 is a sectional view taken on line VIII- VIII of Fig. 6; and

Fig. 9 is a sectional view taken on line IX-IX of Fig. 6.

Like numerals designate corresponding parts throughout the various views of the drawings.

The door lock comprising my present invention is made up of two units. In and Ii, one of which (l0) is adapted to be attached to a door Jamb i2 46 and the other of which (I i) is adapted to be attached to a door i3. Referring to the former iirst, the unit i0 has a box-like member Il ttached to an angle iron i6 which is provided with suitable holes i6 whereby the same maybe attitchedv to a corner of the door lamb indicated at i2. The box-like member Il is provided at one end with a short shaft Il which traverses the interior of the box-like member and projects slightly through the slots IB formed in the sides of the box. washers I9 surrounding the shaft ends. This shaft I1 has a strong spring 20 coiled around the central portion thereof and one end 2| oi.' this spring 21| is anchored by passing it through a small hole in the bottom of the box I4 and the angle iron I5 and by bending it over to hold it in this position. The central portion of the spring is protected by an ear 22 which extends inwardly from the central portion of the adjacent box end.

The other end of the spring`2il is anchored in a hole 23a in one of the spaced parallel arms 22. The shaft I1 passes through these arms 23, apertures 24 beingprovided for such purpose. At their distal ends the arms 23 have a pin 25 passing therethrough and between these arms is secured one end of a link 26 through which pin 25 also passes. The link end is cut away internally so as to provide a space for a spring 21, this spring being coiled around the pin and having one end anchored in a slot 2l in the link end. The previously mentioned spring 20 is so mounted as to urge arms 23 within the box I4 whereas the latter spring 21 is so constructed and positioned as to urge the link 2l into a position between and iiush with said arms 23.

The other end of the link 2B is cut away to produce a reduced end 2l and this end 20 is so configured as to have a beveled point I0 and an intermediate rounded portion 3| through which passes a rivet or the like 32 on which is Divo'ted the interlocking boit 33 which has a bifurcated portion 34 in which the link end operates. The interlocking bolt is otherwise somewhat mushroom shape except that on one side it has an undercut groove 35. When the unit is collapsed (as in Fig. 4) the shoulders 2l of the bolt 22 rest against the upper edges ci the arms 2l. The beveled point of the end of link 2G is adapted to abut against the under surface of the interlocking bolt between the bifurcated portions i4 thereof to limit relative movement of the link and head. Near the other end of the box I4 a stationary interlocking bolt 21 is mounted and.

this has an undercut groove 2i in its side similar to that already described in connection with the first interlocking bolt Il. The slots l5 are in vertical alignment and are adapted to effect proper cooperation with the locking elements to be described hereinafter in connection with the unit Il. l

The unit (I I) which is adapted to be attached to a door Il is provided with a housing 4I which is box-like in nature except that it has one open side and a pair of opposed inturned flanges 4I and covers the unit lli when the door is closed. Mounted interioriy o! the housing is a locking device 42 which comprises a central rounded disk-like portion 48, a lever arm 44, and an oppositely extending lever 45, the latter lever arm lhaving a lateral extension 4B in which a semicircular cut-out portion 41 is formed. This locking device 42 is connected suitably to and is operated by a handle 48 on the outer side of the housing 40 and this handle is adapted to assume the dotted line positions shown in Fig. 1, the signficance of which will be pointed out hereinafter. Adjacent handle 4B is a locking slide 4l provided with a protuberance il by umeans of which it may be slid up and down. The housing III beneath the slide 49 is provided with two spaced vertical slots 5I through-each o! which a pin 52 extends, said pins being secured to the rear side of the locking slide. One such pin l2 has a shield plate 5l secured thereto which covers the upper slot Il when the slide 4Q is in its uppermost position. The lower pin 52 is adapted to be received in the semi-circular recess 41 in the lateral extension 4l of the lever arm 45, and such will be clearly understood by reference to Fig. 5. In such position the door can not be operated as will more clearly appear hereafter.

Fig. 6 particularly illustrates the portion of this unit of the lock which lits into the housing 4l and cooperates with the locking device lever arms 44 and 45 and the locking slide 49 described in connection with Fig. 5. The plate 54 extends the full area of the casing 4|i, that is, from one side to the other and is located just below the slide plate BI and is provided with two large apertures BI of sumcient size to receive the locking bolts 33, 31 hitherto described. The plate 54 is also provided with two smaller apertures BE, the purpose of which will be hereinafter understood. The plate I4 is further provided with a slot 51 through which projects the pin 58 which has a square head 5l. This head l! is designed to move within the slot or space BU formed by cutting away portions of the locking sliding plate elements Il, these locking elements being in the form of separate but contiguous plates'having one end l2 of each rounded and beveled.

Secured to one side of the plate 54 is a metal strap Il secured at one end to said plate by a rivet or the like I4 and the other end of which is provided with two spaced leg-like projections Each locking element il is provided with a slot lB, and a screw having an enlarged head I1 has its shank Il passing through such slot and through said plate 54. 'I'he locking elements are also each provided with a hole through which passes a short rod or pin 10, the said plate 54 being provided with the slots 1I in which said pins operate. On the opposite side of plate 54 a pair o! springs 12 are mounted, each of which has one end secured to the shank il oi' a screw I1 and the other end attached to an enlarged end of a pin 1I. 'I'he plate 54 is also provided with four screw holes through which pass the screws 13 which extend into the U-shaped ends 14 between which extends at one end thereof the connecting bar 1I. A bar lock 16 is mounted as shown upon said bar 1! and screws 11 pass thrdugh holes provided in both members 15 and 1I in such manner that member 1I has a limited movement laterally or member 1I to make accessible or inaccessible the channel between the U-shaped member and the central portion ot Z-plate 1l to prevent the possible insertion of a lock-picking blade. A Z-shaped plate 1l is provided as shown and this plate has two holes which register with the holes 5l and 1I in the plate I4 and locking elements Il, respectively. One angular extension Il of the Z-plate is provided with apertures by means of which the same can be secured to or within a door by screws or the like 4I. it being understood that preferably the door is cut away to receive an entire unit. 'Ihe central portion of the Z-plate 14 has a cylindrical projection B2 which is adapted to receive the biiurcated portion oi' the element 82 which has a circular upper portion I4 with a somewhat radial projection I5 shaped as shown adapted to cooperate with pin 58. The other angular portion of Z-plate Il is provided with two small apertures 88 adapted to receive the leg-like projections il on the bar 43. It will be noted that when pin Il is actuated by the projection 85 Just described in opposition to the springs 12, both members Il release their bolts I3 and 31: the projection li is actuated by f a key which is adaptedto enter the slot in the bifurcated portion 83 which may form a part. of a Yale or other standard look which is mounted around the said slot in any suitable manner.

In operating my'new door lock, assuming that the door is closed, a small clockwise movement of the operating handle releases the stationary bolt but not the bolt on the extensible linkage. This occurs because the upper lever arm 44 in the housing moves the adjacent locking plate element 6i only. When the door is opened it can open only so far as permitted by the extensible linkage. From this position the door can be fully opened by a counterclockwise movement of the operating handle as this releases the other bolt. From closed position also the door can be fully opened by a counterclockwise movement of the operating handle because the lower slide 6I retracts the upper slide.

In either closed or partially open position the lock can be prevented from being released further or at all by engaging the lower pin on the locking slide in the recess in the lateral extension of the lower locking lever. This is accomplished by a simple manipulation as will be understood. In either closed or partiallyopen position the lock can be released by the right key from the outside. The key unlocks the regulation Yale or other lock and at the same time releases the present lock fully due to the action of the radial projection 85 on the square-headed pin shank 58.

It will be noted that the adjoining edges of ele ments 6i are so coniigured (see Figs. 6 and 7) that the `upper (Fig. 6) element 6I may move alone but that movement of the other element 6| causes movement of both elements. Actuation of pin 58 by a key or the like therefore moves both elements 6i since the square head 59 acts upon Vadjacent portions of both elements, thus withdrawing ends 62 from engagement with grooves 35 of the interlocking bolts. When locking slide 49 is in operative (locking) position the relationship between pin 58 and projection 85 is that shown in full lines in Fig. "I, the dotted line positions being-the unlocked condition of the parts. Lever arm 44, when it is moved by the handle 48, engages the plate moving means B9 when the handle is turned in one direction and when it is turned in the opposite direction it engages corresponding plate movlng means 69 in the other plate and if the last mentioned plate is operated by the handle first then the cooperation between the two plates moves the other plate simultaneously.

Strap 63 is positioned in such a manner on the plate 54 that it covers the meeting edges o! the plate 6I and also serves as a guide for the operating means 59 secured to the pin 5B.

Handle 48 is connected with the lever 43 which in turn operates the plates according to the direction in which the handle is turned and the plates are operated as above stated by extended arms 44 and 45 engaging over the plate engaging means 69 attached to the plates.

The foregoing is intended as illustrative only and I may make various changes and modifications without departing from the spirit and principles hereof. Rather the invention is to be dened by the appended claims.

Having thus described my invention, what I claim is new and desire to secure by Letters Patent is:

1. A door lock comprising a unit adapted to be attached to a door jamb, a unit adapted to be attached to a door, a normally collapsed extensible linkage having spring hinge joints to throw the links to retracted position secured to the first unit at one end and normally releasably interlocked with the second unit at the other end, means for partially separating the units by extending the extensible linkage but without releasing it and means for completely separating the units in which case said extensible linkage is released from the second unit.

2. In a door lock of the character described, a unit adapted to be attached to a door jamb, said unit comprising a box-like member secured to an angle iron, a stationary interlocking bolt disposed in one end of said box-like member, an extensible linkage pivotally mounted in the other end of said box-like member and terminating in an interlocking bolt, said extensible linkage being normally spring urged within said box-like member and each interlocking bolt being provided with a vertically aligned undercut lateral groove adapted to receive the locking elements of an associated cooperating unit.

3. Structure as set forth in claim 2 wherein the extensible linkage is composed of a pair of spiced parallel arms mounted upon a pin extending through said box-like member, a link member pivotally cmnected between the distal ends of said spaced arms and having a reduced opposite extremity terminating in a beveled point and a pair of opposed slots in said box-like member in which said pin is adapted to slide.

4. In a door lock unit adapted to be attached to a door, a Z-plate, a pair of U-shaped members disposed on the central portion of said Z-plate and having a connecting bar extending therebetween at one end thereof, a bar lock disposed upon said connecting bar and provided with short transverse slots, a screw passing through each such slot and into said connecting bar whereby said bar lock is capable of limited transverse movement, a housing in which said members are adapted to be positioned, a pair of opposed inturned flanges on said housing and a channel between said U-shaped members and the central portion of said Z-plate which is adapted to be rendered inaccessible when said bar lock is in one position and which is rendered accessible when said bar lock is in its other position.

5. In a door lock of the character described, a unit which is adapted to be attached to a door comprising a housing, a locking element assembly disposed in said housing and bodily removable therefrom, a pair of complementarily edged locking plates forming a part of said locking assembly and laterally movable with respect thereto,

said locking plates being normally spring urged i into locking position, and means permanently mounted within said housing and operated from the exterior thereof to retract one or both of said locking plates from normal position thereof, a second means in said housing and operated from the exterior to retract both of said locking plates from their normal position, said plates being provided with opposed cut away portions which together form a chamber adapted for the slidable reception of said second means.

6. In a door lock of the character described, a unit which is adapted to be attached to a door comprising a housing, a locking element assembly disposed in said housing and bodily removable therefrom, a pair of complementarily edged locking plates forming a part of said locking assembly and laterally movable with respect thereto, said locking plates being normally `spring urged into locking position, and means permanently mounted within said housing and operated from the exterior thereof to retract one or both o! said locking plates from normal position thereof, a bar secured at one end to the locking assembly and having an offset portion extending over the contiguous complementarily shaped locking plate edges for guiding said locking plates and means for removably attaching the end of said bar to an adjoining portion of the assembly.

7. In a door lock of the character described, a unit which is adapted to be attached to a door comprising a housing, a locking element assembly disposed in said housing and bodilyr removable therefrom, a pair of complementarily edged locking plates forming a part of said locking assembly' and laterally movable with respect thereto, said locking plates being normally spring urged into locking position and means permanently mounted within said housing and operated from the exterior thereof to actuate one or both of said locking platos in opposition to the normal position thereof, said means comprising a central disk-like portion with a pair of diametrically oppositely extending locking lever arms one oi' which -is provided with a lateral extension having a semi-circular recess near its lateral extremity. a pin adapted to enter said recess, a locking slide on the exterior of the housing, said pin being disposed upon said locking slide and extending through s. slot provided in said housing. and means for relatively moving said pin and said recess to engaging and non-engaging positions.

EDMUND LIPINER.

CERTIFICATE OF CORRECTION Patent No 2,1?` 11,890.

October 5, 1959.

EDMUND LIPINER. It is hereby certified that errorappears in the printed specification of the above numbered patent requiring correction as follows: column, line 59, for "lever h5" read lever arm-h5;

line h5, claim ii, clairs, for "accessible" Page 2, first page 5, second column,

for the word "inaccessible; read accessible; line h6, same read inaccessible; and that the saidLetters Patent should be read with'l this correction therein that the same may conform to the record ofthe casein the Patent Office.

signed and sealed this 1mm :my or November, s.. D. 1959.

(Seal) Henry Van Arsdale Acting Commissioner of Patents.

ated from the exterior thereof to retract one or both o! said locking plates from normal position thereof, a bar secured at one end to the locking assembly and having an offset portion extending over the contiguous complementarily shaped locking plate edges for guiding said locking plates and means for removably attaching the end of said bar to an adjoining portion of the assembly.

7. In a door lock of the character described, a unit which is adapted to be attached to a door comprising a housing, a locking element assembly disposed in said housing and bodilyr removable therefrom, a pair of complementarily edged locking plates forming a part of said locking assembly' and laterally movable with respect thereto, said locking plates being normally spring urged into locking position and means permanently mounted within said housing and operated from the exterior thereof to actuate one or both of said locking platos in opposition to the normal position thereof, said means comprising a central disk-like portion with a pair of diametrically oppositely extending locking lever arms one oi' which -is provided with a lateral extension having a semi-circular recess near its lateral extremity. a pin adapted to enter said recess, a locking slide on the exterior of the housing, said pin being disposed upon said locking slide and extending through s. slot provided in said housing. and means for relatively moving said pin and said recess to engaging and non-engaging positions.

EDMUND LIPINER.

CERTIFICATE OF CORRECTION Patent No 2,1?` 11,890.

October 5, 1959.

EDMUND LIPINER. It is hereby certified that errorappears in the printed specification of the above numbered patent requiring correction as follows: column, line 59, for "lever h5" read lever arm-h5;

line h5, claim ii, clairs, for "accessible" Page 2, first page 5, second column,

for the word "inaccessible; read accessible; line h6, same read inaccessible; and that the saidLetters Patent should be read with'l this correction therein that the same may conform to the record ofthe casein the Patent Office.

signed and sealed this 1mm :my or November, s.. D. 1959.

(Seal) Henry Van Arsdale Acting Commissioner of Patents. 

